Well drilling apparatus



Oct. 6, 1931. H. PIPPIN 1,

WELL DRILLING APPARATUS Filed Dec. 16, 1930 Patented one, 1931 UNITEDsnares HASKEL A. PIPPQIIN, OF OKMULGEE, OKLAHOMA WELL nnnlnme arrmrnsApplication filed December 16, 1930. Serial No. 502,760.

My invention relates to improvements in apparatus for drilling wells, Ilarly, though not exclusively, adapted for deep well drilling.

An important object of the Invention is to provide a device for theabove purpose having two armatures rotating in opposite directions tomaintain the apparatus carrying the fields of the armatures fromrotation, and to make the fields of both armatures oppose each other sothat the fields and the structure 7 to which they are connected will besubstantially stationary during the operation of drilling.

Another object of the invention is toprovide such apparatus with afollower adapted to operate on the walls of the hole to facilitateremoval of the apparatus.

Other objects and advantages of the inven tion will become apparentduring the course of the following specification which is to be read inconnection with the accompanying drawings, in which Fig'ure 1 is a sideview of a device embodying the invention, the same being partly insection and partly in elevation;

Figure 2, a sectional view on the line 22 of Figure 1;

' Figure 3, a sectional view on the line 3-3 ofF1gure1;"

Figure 4,-a sectional view on the line 14 of Figure 1 and Figure 5, asectional view on the line 5-5 of Figure 4.

- Referring to the drawings, the numeral 5 designates an elongatedcasing, having an opening 6 in its top wall and an in its bottom wall,and within which are mounted an upper electric motor 8 and lower motor9, which are constructed to rotate their armatures 10 and 10' inopposite or clock-wise and counter-clockwise directions, respectively. Ashaft 11 extending through the entire casing is journaled in thebearings 12, and is rotated with the armature 10 of the motors, while atubular shaft 13 surrounds the shaft 11 and extends through the motor 19and through the opening 7, and is driven by the armature 10', of themotor 9 in an opposite and is particu- 11 opening 7' direction to thedirection of rotation of shaft A turntable 14 is mounted below thecasing 5 by means of supports 15 which supports are secured in anysuitable manner, in the present instance by integral construction, tothe casing 5 and the stationary cover 16. The turntable is provided withtwo sets of internal gear teeth 17. One set of gear teeth 17 isconnected to the shaft 13 by a gear train 20, while the otheriset ofgear teeth 17 is connected to the s aft 11 by a gear train 21. Thesegear trains 20 and 21 are developed so as to tend to rotate theturntable .14 in the same direction, although their respective drivingshafts rotate in opposite directions, such development of these geartrains 20 and 21 is clearly shown in Figure 2 and 3..

The cutting is done by the drill bit 26 which is mounted in the socket27 of the turntable 14 for rotation therewith, and theta-- pered portion28 leads up to rollers 29 carried by the turntable 14. These rollers ro-'tate with the turntable 14 and smooth and finish the walls of the holeas the apparatus proceeds in its digging operation. A dead weight 30 ismounted on top of the device to provide sufiicient weight. to urge theapparatus downward in drilling. It will be understood that the apparatuscan be suspended by means of drill pipe and couplings, or cable into thewell.

Rotary cutting knives 31 are mounted for rotation with shaft 11 abovethe casing 5, so that as the apparatus proceeds the walls of the wellwill be trimmed thereby to facilitate withdrawal of the apparatus fromthe well and to prevent it from becoming wedged or stuck in the hole ithas dug.

A constant flow of water through the apparatus into the hole being dugis provided by the piping or hose 33-34 leading from openings 3334' inthe casing and downwardlybetween casing 5 and motor 8 and through thetubular shaft 13 and from which the water is delivered into theturntable 14 and thence dis harged into the hole being The operation andadvantages of the device are obvious from the foregoing descripa massestion; and the apparatus and arts can be constructed in VM'IOUS sizes anproportions for Various uses.

I claim:

1. A well drilling ap aratus comprising a casing, two motors int ecasing having armatures rotatable in opposite directions, shaftsconnected to said armatures, respectively, and rotatable therewith, oneof said 10. shafts extending through the entire length of the casing andthrough the other shaft, a turntable mounted on the casing, connectionsbetween each shaft and the turntable tending to rotate the latter in thesame direction, and a drill carried b the turntable.

2. A well dri ling apparatus comprising a casing, two motors in thecasing having ar- I matures rotatable in opposite directions, shaftsconnected to said armatures, respectively, and rotatable therewith, oneof said shafts extending through the entire lengthof the ,casing andthrough the other shaft, a. turntable mounted on the casing, connectionsbetween each shaft and the turntable tending 5 to rotate the latter inthe same direction, a drill carried by the turntable, and rollerscarried by said turntable to engage the wall of the hole dug by saiddrill.

3. Thestructure of claim 2 wherein the drill bit is carried by aturntable havin tapered walls extending between the drill bit androllers. 4. The structure of claim 2 wherein a rotary cutting knife ismounted above the eas- 5 ing and operated by one of said shafts as afollower to trim'the-walls of the well hole. In testimony whereof Ihereunto afiix my signature. HASKEL A. PIPPIN.

